EP0200571B1 - Garden or sun umbrellas - Google Patents

Garden or sun umbrellas Download PDF

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Publication number
EP0200571B1
EP0200571B1 EP86303387A EP86303387A EP0200571B1 EP 0200571 B1 EP0200571 B1 EP 0200571B1 EP 86303387 A EP86303387 A EP 86303387A EP 86303387 A EP86303387 A EP 86303387A EP 0200571 B1 EP0200571 B1 EP 0200571B1
Authority
EP
European Patent Office
Prior art keywords
umbrella
post
arms
spring
collar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86303387A
Other languages
German (de)
French (fr)
Other versions
EP0200571A2 (en
EP0200571A3 (en
Inventor
Malcolm Stewart Robertson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0200571A2 publication Critical patent/EP0200571A2/en
Publication of EP0200571A3 publication Critical patent/EP0200571A3/en
Application granted granted Critical
Publication of EP0200571B1 publication Critical patent/EP0200571B1/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B23/00—Other umbrellas
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B25/00—Details of umbrellas
    • A45B25/16—Automatic openers, e.g. frames with spring mechanisms
    • A45B25/165—Automatic openers, e.g. frames with spring mechanisms with fluid or electric actuators
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
    • A45B23/00—Other umbrellas
    • A45B2023/0012—Ground supported umbrellas or sunshades on a single post, e.g. resting in or on a surface there below

Definitions

  • This invention relates to large umbrellas of the kind which stand on the ground and are used as sunshades and which are variously referred to as garden umbrellas or sun umbrellas. For convenience they will be referred to herein after simply as garden umbrellas.
  • Such umbrellas comprise a central post or support, a plurality of arms or ribs hinged to the upper end of the central post and spaced therearound, means for raising those arms or ribs from a collapsed position along side the central post to an erected or open position in which those arms extend in radial array around the post to form the frame of the umbrella, a fabric canopy attached, usually removably so, to those arms or ribs, and means for locking or holding those arms in the extended or open position of the umbrella.
  • the means for erecting or opening the umbrella comprises a strut hingedly connected at one end to each rib at an intermediate point thereon and at the other end to a collar or ring positioned about and axially slidable along the central post or support.
  • a collar or ring positioned about and axially slidable along the central post or support.
  • Releasable means are provided to lock the collar or ring in its upper position thereby to hold the umbrella in its open position.
  • a sun umbrella In UK-A-1,357,870 a sun umbrella is disclosed in which the umbrella is opened by a handle pivotally connected to the crown member of the umbrella by a flexible cable, and in German Petty Patent No. GM 8230261 a sun or garden umbrella is disclosed in which a gas spring is used to adjust the vertical height of the umbrella, but not the opening action.
  • an automatic sun umbrella which is effectively fully automatic, and does not require a winding handle for either the opening or closing operation which are effected by simple manual pressure on the canopy in either direction, i.e. whether in the opening or the closing direction.
  • a spring is located inside the central support or post. Means are provided operatively connecting the spring to the collar to bias the collar permanently towards the upper position, i.e. the open position of the umbrella.
  • the spring is a gas spring, whose operating characteristics are designed to power a slow opening of the umbrella but a rapid collapse, once the collapse has been initiated by downward pressure on the arms of the open umbrella.
  • locking means can be provided to lock the umbrella in its open condition, but preferably the umbrella is so designed that it is held in the open position solely by the action of the spring.
  • a stop can be provided, if necessary, on the upper part of the post to limit the upward travel of the collar, and thereby provide means for positively locating the collar on the post when the umbrella is in its open condition.
  • Means can likewise be provided to hold the arms or ribs in the collapsed condition against the bias of said spring, but in the preferred arrangement, the design is such that the arms or ribs will remain in the collapsed condition under their own weight until such time as the upward or opening action is initiated by an initial manual movement of the free ends of the arms outwardly and upwardly away from the post.
  • the means operatively connecting the spring to the collar comprise a flexible cord fastened at both ends to the collar and passing internally of the hollow post over pulleys mounted in sheave blocks located in apertures on opposite sides of the post, and passing over at least one pulley rotatably mounted on the spring.
  • the cord is reeved around pulleys mounted at each end of the spring.
  • a preferred embodiment of the hoisting mechanism of this invention is illustrated in the accompanying drawing and in which the single figure shows a vertical section through the hoisting mechanism.
  • numeral 1 indicates the hollow central post of the umbrella. Hinged to the upper end of the post are the arms or ribs 2 of the umbrella which support the fabric canopy 3. This is detachably fastened by ropes or cords 4 stitched or otherwise attached to the canopy and secured in jamming cleats 5 on the underside of each end of each arm.
  • Struts 6 are hingedly connected (not shown) intermediate the ends of each arm 2 and to a collar 7 freely movable on the post 1.
  • a gas spring 8 Located in the upper end of the post 1 is a gas spring 8 carrying at its opposite ends pulley blocks 9 and 10.
  • a flexible cord 11 reeved around the pulley blocks 9 and 10 and passing over two further pulleys 12 and 13 mounted in sheave blocks 14,15 in apertures on opposite sides of the post 1. At its opposite ends the cord 11 is connected to the collar by shackles 16, 17.
  • the gas spring 8 is mounted in compression in the loop formed internally of the post 1 by the cord 11 reeved around the pulleys 9, 10 and exerts a lifting action on the collar 7.
  • the collar 7 In the collapsed condition of the umbrella, the collar 7 will be in its lower most position on the post, and the gas spring will be in its maximum state of compression. In this position, the arms 2 will hang down alongside the post 1, and the design parameters are such that in this position the arms will remain there under their own weight. Less preferably, means can be provided to fasten or hold the arms in the collapsed position. Upon release of the fastening, or in the preferred arrangement, an initial manual movement of the free ends of the arms 2 away from the post initiates the automatic opening of the umbrella, under the action of the gas spring 8 as indicated by the direction of the heavy arrows. Preferably the operating characteristics of the gas spring are such that this opening action takes place relatively slowly.
  • the canopy In the open position, the canopy is supported solely by the action of the spring 8, and if desired a stop (not shown) can be provided on the post 1 to locate the collar 7 at the upper limit of its travel. Similarly, although unnecessarily, a latch can be provided to lock the umbrella in its open position.
  • the present invention at least in its preferred embodiment provides a simple but effective mechanism for the automatic opening of large umbrellas, and one which is easily maintained.
  • the gas spring 8 and its associated pulley blocks 9 and 10 are a unitary assembly which is a loose sliding fit in the post 1, being held in position simply by the cord II. Cutting or unfastening the cord simply allows the gas spring assembly to drop out the bottom of the post, and from which it can be recovered for repair or maintenance. Following that, the assembly is reinserted into the post and the cord rethreaded.
  • the invention has further advantages in that, in its open position the arms 2 are not rigidly locked in position, at least in the preferred embodiments, but are resiliently supported by the spring.
  • the resiliency will also help to accommodate differential tensions in the canopy, caused for example during initial tensioning and stretching of the canopy onto the frame, but also any permanent or temporary shrinkage of the canopy such as might occur, for example, if the canopy gets wet.
  • the canopy is therefore less subject to damage, for example, tearing.

Landscapes

  • Holders For Apparel And Elements Relating To Apparel (AREA)
  • Walking Sticks, Umbrellas, And Fans (AREA)

Description

  • This invention relates to large umbrellas of the kind which stand on the ground and are used as sunshades and which are variously referred to as garden umbrellas or sun umbrellas. For convenience they will be referred to herein after simply as garden umbrellas.
  • Such umbrellas comprise a central post or support, a plurality of arms or ribs hinged to the upper end of the central post and spaced therearound, means for raising those arms or ribs from a collapsed position along side the central post to an erected or open position in which those arms extend in radial array around the post to form the frame of the umbrella, a fabric canopy attached, usually removably so, to those arms or ribs, and means for locking or holding those arms in the extended or open position of the umbrella.
  • In one arrangement the means for erecting or opening the umbrella comprises a strut hingedly connected at one end to each rib at an intermediate point thereon and at the other end to a collar or ring positioned about and axially slidable along the central post or support. To open the umbrella the collar or ring is pushed upwardly to a position in which the struts support the ribs in open array. Releasable means are provided to lock the collar or ring in its upper position thereby to hold the umbrella in its open position.
  • In UK-A-1,357,870 a sun umbrella is disclosed in which the umbrella is opened by a handle pivotally connected to the crown member of the umbrella by a flexible cable, and in German Petty Patent No. GM 8230261 a sun or garden umbrella is disclosed in which a gas spring is used to adjust the vertical height of the umbrella, but not the opening action.
  • In DE-A-2236149 another type of spring actuated garden umbrella is shown. In this case the umbrella is biassed into its open position by means of a compression spring mounted inside a tubular post which has an inner slidable section biassed upwardly by the spring to effect opening of the umbrella. Closing the umbrella is effected by a crank handle connected by a flexible cord and by means of which the inner slidable section of the post may be retracted against the spring bias thereby to lower the canopy.
  • In the present invention an automatic sun umbrella is provided which is effectively fully automatic, and does not require a winding handle for either the opening or closing operation which are effected by simple manual pressure on the canopy in either direction, i.e. whether in the opening or the closing direction.
  • According to the invention a spring is located inside the central support or post. Means are provided operatively connecting the spring to the collar to bias the collar permanently towards the upper position, i.e. the open position of the umbrella. Preferably the spring is a gas spring, whose operating characteristics are designed to power a slow opening of the umbrella but a rapid collapse, once the collapse has been initiated by downward pressure on the arms of the open umbrella.
  • If desired locking means can be provided to lock the umbrella in its open condition, but preferably the umbrella is so designed that it is held in the open position solely by the action of the spring. A stop can be provided, if necessary, on the upper part of the post to limit the upward travel of the collar, and thereby provide means for positively locating the collar on the post when the umbrella is in its open condition.
  • Means can likewise be provided to hold the arms or ribs in the collapsed condition against the bias of said spring, but in the preferred arrangement, the design is such that the arms or ribs will remain in the collapsed condition under their own weight until such time as the upward or opening action is initiated by an initial manual movement of the free ends of the arms outwardly and upwardly away from the post.
  • In the preferred embodiment, the means operatively connecting the spring to the collar comprise a flexible cord fastened at both ends to the collar and passing internally of the hollow post over pulleys mounted in sheave blocks located in apertures on opposite sides of the post, and passing over at least one pulley rotatably mounted on the spring. Preferably, in order to provide a long lifting action and mechanical advantage the cord is reeved around pulleys mounted at each end of the spring.
  • A preferred embodiment of the hoisting mechanism of this invention is illustrated in the accompanying drawing and in which the single figure shows a vertical section through the hoisting mechanism.
  • Referring to the drawing, numeral 1 indicates the hollow central post of the umbrella. Hinged to the upper end of the post are the arms or ribs 2 of the umbrella which support the fabric canopy 3. This is detachably fastened by ropes or cords 4 stitched or otherwise attached to the canopy and secured in jamming cleats 5 on the underside of each end of each arm.
  • Struts 6 are hingedly connected (not shown) intermediate the ends of each arm 2 and to a collar 7 freely movable on the post 1.
  • Located in the upper end of the post 1 is a gas spring 8 carrying at its opposite ends pulley blocks 9 and 10.
  • Operatively connecting the gas spring 8 to the collar 7 is a flexible cord 11 reeved around the pulley blocks 9 and 10 and passing over two further pulleys 12 and 13 mounted in sheave blocks 14,15 in apertures on opposite sides of the post 1. At its opposite ends the cord 11 is connected to the collar by shackles 16, 17.
  • As will be apparent, the gas spring 8 is mounted in compression in the loop formed internally of the post 1 by the cord 11 reeved around the pulleys 9, 10 and exerts a lifting action on the collar 7.
  • In the collapsed condition of the umbrella, the collar 7 will be in its lower most position on the post, and the gas spring will be in its maximum state of compression. In this position, the arms 2 will hang down alongside the post 1, and the design parameters are such that in this position the arms will remain there under their own weight. Less preferably, means can be provided to fasten or hold the arms in the collapsed position. Upon release of the fastening, or in the preferred arrangement, an initial manual movement of the free ends of the arms 2 away from the post initiates the automatic opening of the umbrella, under the action of the gas spring 8 as indicated by the direction of the heavy arrows. Preferably the operating characteristics of the gas spring are such that this opening action takes place relatively slowly.
  • In the open position, the canopy is supported solely by the action of the spring 8, and if desired a stop (not shown) can be provided on the post 1 to locate the collar 7 at the upper limit of its travel. Similarly, although unnecessarily, a latch can be provided to lock the umbrella in its open position.
  • In order to close the umbrella, downward pressure is simply applied to the outer ends of the arms 2. This initiates the collapse of the arms, and recompression of the gas spring in readiness for the next opening action. Preferably the operating characteristics of the spring are such that the collapse takes place more rapidly than the opening.
  • As will be apparent, the present invention at least in its preferred embodiment provides a simple but effective mechanism for the automatic opening of large umbrellas, and one which is easily maintained. In particular, in the preferred arrangement, the gas spring 8 and its associated pulley blocks 9 and 10 are a unitary assembly which is a loose sliding fit in the post 1, being held in position simply by the cord II. Cutting or unfastening the cord simply allows the gas spring assembly to drop out the bottom of the post, and from which it can be recovered for repair or maintenance. Following that, the assembly is reinserted into the post and the cord rethreaded.
  • Besides providing an automatic opening mechanism, the invention has further advantages in that, in its open position the arms 2 are not rigidly locked in position, at least in the preferred embodiments, but are resiliently supported by the spring. This gives the umbrella a degree of resilient flexibility which is of value if the umbrella is left open in windy or strong conditions. The resiliency will also help to accommodate differential tensions in the canopy, caused for example during initial tensioning and stretching of the canopy onto the frame, but also any permanent or temporary shrinkage of the canopy such as might occur, for example, if the canopy gets wet. The canopy is therefore less subject to damage, for example, tearing.
  • Various modifications can be practised in the above described design without departing from the scope of this invention as defined in the appended claims.

Claims (4)

1. A garden or sun umbrella comprising a central post (1) for supporting the umbrella, a plurality of arms (2) hinged to the upper end of the post and spaced therearound, said arms being pivotable from a first, collapsed position in which they hang down alongside the central post to a second, open position in which they extend in radial array around the post to support the fabric canopy (3) of the umbrella, and means for erecting the umbrella, said erecting means comprising a plurality of struts (6) hingedly connected at one end to the arms of the umbrella and at the other to a collar (7) on the central post and a compression spring (8) mounted inside the post operable to bias the hinged arms (2) relative to the collar in a direction to effect the opening of the umbrella, characterised in that the collar (7) is slidably mounted on the post (1) and is movable thereon between a first upper position in which the struts (6) connected thereto support the arms(2)of the umbrella in their extended radial array to support the canopy of the umbrella in its open position under the bias of said compression spring, and a second lower position in which the struts (6) and the arms (2) hang essentially alongside the post (1) with the umbrella in its closed position, the automatic opening of the umbrella being effected by an initial manual pivoting of the arms (2) when in their collapsed position in a direction away from the post (1) through a small angle, following which the automatic opening action is completed by the operation of said springs (8) biassing said collar downwardly on said post, and the closing of the umbrella being effected by downward manual pressure on the arms (2) of the umbrella, when in the open position, there by pivoting the arms (2) downwardly into the collapsed position with simultaneous compression of the spring (8) and in which latter position the compression spring (8) is compressed ready for the next opening action, the spring (8) being held in that compressed condition solely by the weight of the canopy and the associated ribs.
2. An umbrella according to claim 1, characterised in that the spring (8) is mounted in compression in the upper end of the central post (1) and is connected to the collar (7) by means of a flexible cord (11) connected at its opposite ends to the collar (7) and passing over sheave blocks (14, 15) mounted in apertures on opposite sides of the post (1) adjacent its upper end.
3. An umbrella according to claim 2, characterised in that the flexible cord (11) is reeved around pulley blocks (9, 10) at both ends of the spring (8).
4. An umbrella according to anyone of claims 1-3, characterised in that the spring (8) is a gas spring.
EP86303387A 1985-05-03 1986-05-02 Garden or sun umbrellas Expired EP0200571B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8511370 1985-05-03
GB858511370A GB8511370D0 (en) 1985-05-03 1985-05-03 Garden/sun umbrellas

Publications (3)

Publication Number Publication Date
EP0200571A2 EP0200571A2 (en) 1986-11-05
EP0200571A3 EP0200571A3 (en) 1987-08-26
EP0200571B1 true EP0200571B1 (en) 1990-12-12

Family

ID=10578651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86303387A Expired EP0200571B1 (en) 1985-05-03 1986-05-02 Garden or sun umbrellas

Country Status (4)

Country Link
US (1) US4807655A (en)
EP (1) EP0200571B1 (en)
DE (1) DE3676108D1 (en)
GB (1) GB8511370D0 (en)

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US5806547A (en) * 1995-10-02 1998-09-15 Derlinga; Thomas S. Combination umbrella and gazebo
US5711332A (en) * 1996-01-26 1998-01-27 American Holtzkraft, Inc. Strutless umbrella
US5626160B1 (en) * 1996-08-13 1999-01-12 Ko Chin Sung Umbrella having means for opening and closing the same automatically
GB2325405A (en) * 1997-05-21 1998-11-25 Ko Chin Sung Automatic umbrella control cord mechanism
US5758677A (en) * 1997-06-05 1998-06-02 Wang; Shen Ho Umbrella structure for controlling an automatic opening
US5803102A (en) * 1997-09-09 1998-09-08 Ko; Chin-Sung Protecting structure of control members of a folded umbrella
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US6170497B1 (en) * 1999-02-09 2001-01-09 Joen-Shen Ma Umbrella opening mechanism
JP3475327B2 (en) * 1999-10-08 2003-12-08 株式会社パイオラックス Air damper
AU780129B2 (en) * 1999-11-17 2005-03-03 Powerbrella C.C. An umbrella mechanism
CN2442558Y (en) * 2000-09-21 2001-08-15 吴接枝 Sliding device for four-folded umbrella
EP1510145B1 (en) * 2003-08-29 2011-05-11 Dougan Clarke Height adjustable umbrella assembly
EP1727949A4 (en) * 2004-03-01 2009-03-04 Mark Snyders Outreach screen
US20080053497A1 (en) * 2006-08-31 2008-03-06 Reza Jalili Umbrella with ropes
US8079378B1 (en) * 2009-02-09 2011-12-20 Thomas S Derlinga Combination umbrella and gazebo
CN202026974U (en) * 2011-04-12 2011-11-09 马准安 Controllable automatic umbrella opening device
US8087420B1 (en) * 2011-04-25 2012-01-03 Steven A. Lukacsy Gravity-powered, wind-resistant and self-opening umbrella system
KR101119657B1 (en) 2011-12-12 2012-03-16 주식회사 동아스트 Folding shading pergolas
US8757183B2 (en) * 2012-10-05 2014-06-24 Dee Volin Solar-powered pulley-assisted umbrella having simultaneously and oppositely movable top-and-bottom weighted brackets
US20140373886A1 (en) * 2013-06-20 2014-12-25 Chin-sung Ko Contraction structure of center post of self-opening umbrella
US9655416B1 (en) 2014-05-13 2017-05-23 Dougan H. Clarke Crank handle positioning assembly for an umbrella
US11076663B2 (en) * 2015-10-09 2021-08-03 Current Products Corp. Umbrella system
US11910891B2 (en) 2015-10-09 2024-02-27 Current Products Corp. Umbrella system
US9591903B1 (en) * 2016-02-18 2017-03-14 Ai-Hui Huang Electric umbrella having roller sets
WO2017178042A1 (en) * 2016-04-12 2017-10-19 Royal Botania A strutless umbrella frame for supporting a canopy
WO2018026824A1 (en) * 2016-08-01 2018-02-08 Sol Umbra, Llc Crankless cantilevered umbrella
KR102182197B1 (en) * 2018-10-31 2020-11-26 주식회사케이비테크놀로지 Umbrella Structure
US10653218B1 (en) 2020-02-05 2020-05-19 Dee Volin Umbrella with projector lighting device
US11317688B2 (en) * 2020-06-28 2022-05-03 Linhai Guokang Leisure Products Co., Ltd. Straight-pole sun umbrella hand-cranking device
US11910890B2 (en) 2020-07-16 2024-02-27 Current Products Corp. Umbrella system
DE102020119745A1 (en) * 2020-07-27 2022-01-27 Knirps International Gmbh Height-adjustable mast and/or extension arm
EP4179915B1 (en) * 2021-11-12 2024-09-25 Activa Leisure Inc. Umbrella assembly with gas spring

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Also Published As

Publication number Publication date
EP0200571A2 (en) 1986-11-05
GB8511370D0 (en) 1985-06-12
DE3676108D1 (en) 1991-01-24
EP0200571A3 (en) 1987-08-26
US4807655A (en) 1989-02-28

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